washburn



(No Model.)

0. G. WASHBURN.

COTTON GIN RIB.

.No. 441,344. Patented Nov. 25, 1890.

I N VEJV TOR Charles G. TVflbZlW/Z.

WI TJV' ESSES NITEl) STATES PATENT FFIcE.

CHARLES G. IVASHBURN, OF SING SING, NEW YORK, ASSIGNOR TO ISAAC T. WVASIIBURN, OF SAME PLACE.

COTTON-GIN RIB.

SPECIFICATION forming part of Letters Patent No. 441,344, dated November 25, 1890.

Application filed April 6, 1888- Serial No. 269,857. (No model.)

T on whom it may concern.-

Be it known that 1, CHARLES G. WASHBURN, a citizen of the United States of America, residing at Sing Sing, in the county of Westchcster, in the State of New York, have invented a new and useful Cotton-Gin Rib, of which the following is a specification.

My invention has relation to improvements in cotton-gin ribs applicable to saw-gins, and

I0 the object is to provide a rib for such machines which will do the work intended with certainty and increased rapidity; and my invention therefore consists in the novel construction of the gin-rib, whereby the purposes intended are fully and with improved results consummated.

I have fully and clearly illustrated my improvements in the accompanying drawings, forming a part of this specification, wherein Figure 1 is a vertical sectional view of the hopper, saws, picker-wheel, and adjacent elements or parts of a saw cotton-gin embracing my improved cotton-gin rib, which is shown mounted therein. Fig. 2 is a top view of the 2 5 rib. Fig. 3 is a perspective of the rib detached, and Fig. at is a side view of the same.

Reference being had to the drawings, A designates the hopper of the cotton-gin; B, the saws thereof, and O the picker-wheel. These parts may be of any of the approved constructions, and being well known, and as it is the intention to construct my improved ginribs as to be easily and practically applied to any saw-gin of similar construction to that shown, it is not deemed essential to a proper understanding of the application and workings of my gin-rib that a more specified and extended description should here be made.

In the hopper is the usual support 1, hinged to the frame of the gin, as at 2, to which sup port the upper ends of the ribs are fastened by screws or otherwise, as at 3 in Fig. 1, and below the saws is a crosspiece 4, to which the lower ends of the ribs are screwed fast, substantially as shown. The relation of the ribs to the saws is regulated by means of adj usting-screws 5 in a cross-piece 6. By turning the screws 5 in the cross-piece 6 the breast of ribs is raised and lowered and set to do the work for coarser or finer grades of cotton.

these means for attaching and arranging the ribs are no part of my invention and may be varied and changed to suit the different constructions of saw-gins, I have only here described them to specify their attachment toa machine of approved construction.

D designates my improved cotton-gin rib. This is cast or formed in a single piece and consists of the stem or main rib 7, formed with shaped ends 8 9, to secure it to the crosspieces of the breast. On the stem of the rib is formed a Web-flange 10, projecting from the longitudinal center of the stem and having its lower portion cut away on the under part and overhanging the stem, as shown at 11, and formed at its free end with hullingflanges 12. The cut-away space in the webflange forms an opening through which the seeds and hulls readily escape into the receptacle. This arrangement of the Web-flange cen- 7c trally on the stem of the rib and the cut-away space under the overhanging and free end of the flange provide means for the escape of the hulls and seeds from both sides of the rib as soon as the seeds are stripped off the cotton, thus leaving the saws clean and free to take fresh uncleaned cotton. At the upper end of the stem the central flange is again broadened, as seen at 13, which construction provides increased frictional surface for the seeds to be acted on between the saws and the flange, and is intended to facilitate the cleaning of longstaple cotton.

hat I claim is A cotton-gin rib D,formed in asingle piece and having the stem with side flanges and a web arranged centrally on the stem and formed with a projection 13 at its upper end and broad part 11 overhanging and free from the stem and terminatingin thehulling-flange 9o 12, substantiallyas described, and for the purpose specified.

In witness whereof I have hereunto set my hand in the presence of two attesting witnesses.

CHAS. e. WASI'IBURN.

Attest: 1

JOHN D. WATSON, FRANK O. HOWLAND. 

